CN103162981B - A kind of shield tunnel segment lining similar test model - Google Patents
A kind of shield tunnel segment lining similar test model Download PDFInfo
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- CN103162981B CN103162981B CN201310041535.9A CN201310041535A CN103162981B CN 103162981 B CN103162981 B CN 103162981B CN 201310041535 A CN201310041535 A CN 201310041535A CN 103162981 B CN103162981 B CN 103162981B
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Abstract
The invention discloses a kind of shield tunnel segment lining similar test model, comprise and form section of jurisdiction ring by analog material is integrated poured, section of jurisdiction ring has the groove of simulative tube strip terminal rigidity weakened treatment, it is characterized in that: described section of jurisdiction ring is divided into upper area (1a), lower area (1b), left field (1c), right side area (1d), the groove (2a) of the simulative tube strip terminal rigidity weakened treatment of upper area (1a) and lower area (1b) is driveed in the inner side of section of jurisdiction ring, left side, the groove (2b) of the simulative tube strip terminal rigidity weakened treatment of right side area is driveed in the outside of section of jurisdiction ring.This kind of test model better can simulate the mechanical characteristic at shield tunnel segment joint position, especially can well simulate large deformation and the progressive failure process of shield tunnel segment lining; Test error is little, to the design in tunnel, construction and can safeguard that reinforcing provides more accurately, reliable test figure.
Description
Technical field
The present invention relates to a kind of shield tunnel test model.
Background technology
At present, shield tunnel, due to the advantage of himself, obtains and applies more and more widely in the construction of urban track traffic, more river Sea-Crossing Passage and municipal pipeline etc.Shield tunnel mainly adopts girth joint that the single shell lining section of jurisdiction of multiple arc is spliced into section of jurisdiction ring, then by landing edge, section of jurisdiction ring is assembled into shield tunnel with straight joint or fissure of displacement mode.Due to the difference of the complicacy of hydrogeological conditions, tunnel scale and detail structure, and shield tunnel is to the high request of engineering safety, usually needs the mechanical characteristic being disclosed shield tunnel segment lining structure by model investigation.In view of the complicacy of shield tunnel segment joint, in enforcement shield tunnel model test process, how to consider that the mechanics effect of shield tunnel segment joint is an important problem.
By finding the literature search of prior art, in existing model test, the similar test model that the mechanical characteristic of simulation shield tunnel adopts mainly contains following two kinds:
The first similar test model is using modified routine method as theoretical foundation, with the reduction of the reduction equivalence shield tunnel segment joint position bendind rigidity of the overall bendind rigidity of pipe-plate lining ring, consider the impact of section of jurisdiction girth joint on shield tunnel segment lining structural mechanics characteristic.Thus adopt the circular configurations such as uniform in material metal tube, organic material pipe as similar test model material, according to shield tunnel lateral stiffness equivalence principle, determine similar test model lining thickness, this similar test model only can the overall mechanical characteristics of approximate simulation pipe-plate lining structure in process of the test, but due to the mechanical characteristic such as stress raisers effect and joint rotation that cannot reflect pipe-plate lining joint area, internal forces distribution rule and the prototype tunnel difference of the tunnel duct piece that model test obtains are larger.
The second similar test model is Tongji University's patent of invention (publication number: CN101299008A), the analog material of this model section of jurisdiction employing configuration is integrated poured to be formed, for the rigidity weakened treatment of girth joint, landing edge, be achieved by cutting out corresponding groove outside the section of jurisdiction ring corresponding to girth joint, landing edge position, depth of groove is determined by calculating according to equivalent stiffness principle.
In above-mentioned two kinds of models, the second scale model to ensure that the requirement of model ratio of similitude to a certain extent due to it at process duct piece connector this model, more close with actual conditions, is therefore widely accepted and uses.But in fact section of jurisdiction ring is under the external load effect based on vertical load, the deformation and internal stresses distribution of its different parts is distinguishing: vault, position, arch bottom are by sagging moment effect, and displacement is pointed to inside section of jurisdiction, tension inside this section of jurisdiction, position ring; Left haunch, right haunch position are by hogging moment effect, and displacement is pointed to outside section of jurisdiction, tension outside this section of jurisdiction, position ring.The joint (the bolted connection position of adjacent section of jurisdiction) of actual section of jurisdiction ring should show as section of jurisdiction ring tension side and open, and the groove that this model is used for simulative tube strip terminal is all driveed outside the ring of section of jurisdiction, cause section of jurisdiction ring be positioned at vault and arch the end joint (inner side is continuous, without groove) cannot open, thus cause the stress that should not have to concentrate, its distortion and stress and reality inconsistent.Error of test data is large, and especially when simulating shield tunnel segment lining structure and bearing ultimate load generation large deformation and progressive failure, this error brought due to joint processing mode more will be exaggerated.Be difficult to that the design to tunnel, construction and maintenance provide accurately, reliable test figure.
Summary of the invention
The technical problem to be solved in the present invention proposes a kind of shield tunnel segment lining similar test model, this kind of test model better can simulate the mechanical characteristic at shield tunnel segment joint position, especially can well simulate large deformation and the progressive failure process of shield tunnel segment lining; Test error is little, to the design in tunnel, construction and can safeguard that reinforcing provides more accurately, reliable test figure.
The technical solution adopted for the present invention to solve the technical problems is, a kind of shield tunnel segment lining similar test model, comprise and form by analog material is integrated poured groove section of jurisdiction ring, section of jurisdiction ring having simulative tube strip terminal rigidity weakened treatment, it is characterized in that: described section of jurisdiction ring is divided into upper area, lower area, left field, right side area; The groove of the simulative tube strip terminal rigidity weakened treatment of upper area and lower area is driveed in the inner side of section of jurisdiction ring, and the groove of the simulative tube strip terminal rigidity weakened treatment of left side, right side area is driveed in the outside of section of jurisdiction ring.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention is when adopting groove simulation joint area rigidity to weaken, consider the stressed and deformation characteristic under the ring different parts outer load of section of jurisdiction, multidomain treat-ment is carried out to whole section of jurisdiction ring: wherein, top, bottom (vault, the arch end) region are by sagging moment effect, displacement is pointed to inside section of jurisdiction, tension inside this section of jurisdiction, region ring, corresponding groove is driveed inside the ring of section of jurisdiction; And left side, right side (left haunch, right haunch) region by hogging moment effect, displacement is pointed to outside section of jurisdiction, and tension outside this section of jurisdiction, region ring, corresponding groove is driveed outside the ring of section of jurisdiction.Thus achieve section of jurisdiction ring and slot at tension side, under outer load effect can correctly all joints of simulative tube loop open effect, the stress that eliminating to have is concentrated, and makes it be out of shape and stress conforms to actual, and then reduction error of test data.Especially when simulating shield tunnel segment lining structure and bearing ultimate load generation large deformation and progressive failure, this joint processing mode make the distortion of test model, stressed, destroy and the more realistic section of jurisdiction ring correlation properties such as unstability, reduce error of test data more significantly.Thus more accurate, reliable test figure can be provided to the design in tunnel, construction and maintenance.
The upper area of above-mentioned section of jurisdiction ring, lower area, left field, right side area are divided equally, and namely the radian in each region is 90 °.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Accompanying drawing explanation
Fig. 1 is the structural representation of the similar test model of the embodiment of the present invention.In figure, dotted line is the separatrix in four regions of section of jurisdiction ring.
Embodiment
Embodiment
Fig. 1 illustrates, a kind of embodiment of the present invention is, a kind of shield tunnel segment lining similar test model, comprises and forms by analog material is integrated poured groove section of jurisdiction ring, section of jurisdiction ring having simulative tube strip terminal rigidity weakened treatment.Section of jurisdiction ring is divided into upper area 1a, lower area 1b, left field 1c, right side area 1d; The groove 2a of the simulative tube strip terminal rigidity weakened treatment of upper area 1a and lower area 1b drives in the inner side of section of jurisdiction ring, and the groove 2b of the simulative tube strip terminal rigidity weakened treatment of left side, right side area drives in the outside of section of jurisdiction ring.
The upper area 1a of this routine section of jurisdiction ring, lower area 1b, left field 1c, right side area 1d divide equally, and namely the radian in each region is 90 °.
The particular location in each region is: upper area 1a and lower area 1b is vertical axis ± 45 ° along section of jurisdiction ring, and left field 1c, right side area 1d are horizontal axis ± 45 ° along section of jurisdiction ring.
Claims (2)
1. a shield tunnel segment lining similar test model, comprise and form by analog material is integrated poured groove section of jurisdiction ring, section of jurisdiction ring having simulative tube strip terminal rigidity weakened treatment, it is characterized in that: described section of jurisdiction ring is divided into upper area (1a), lower area (1b), left field (1c), right side area (1d); The groove (2a) of the simulative tube strip terminal rigidity weakened treatment of upper area (1a) and lower area (1b) is driveed in the inner side of section of jurisdiction ring, and the groove (2b) of the simulative tube strip terminal rigidity weakened treatment of left side, right side area is driveed in the outside of section of jurisdiction ring.
2. a kind of shield tunnel segment lining similar test model according to claim 1, it is characterized in that: the upper area (1a) of described section of jurisdiction ring, lower area (1b), left field (1c), right side area (1d) are divided equally, and namely the radian in each region is 90 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310041535.9A CN103162981B (en) | 2013-02-01 | 2013-02-01 | A kind of shield tunnel segment lining similar test model |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310041535.9A CN103162981B (en) | 2013-02-01 | 2013-02-01 | A kind of shield tunnel segment lining similar test model |
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| CN103162981A CN103162981A (en) | 2013-06-19 |
| CN103162981B true CN103162981B (en) | 2016-02-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108932902A (en) * | 2018-06-22 | 2018-12-04 | 同济大学 | A kind of Lining Ring design methods of analog shield tunnel girth joint |
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| CN103471796B (en) * | 2013-09-18 | 2016-01-20 | 山东科技大学 | Tunnel Cast-in-place concrete lining anti-seismic performance test methods |
| CN103593558A (en) * | 2013-11-01 | 2014-02-19 | 中南大学 | Shield tunnel segment structure safety evaluation model and method |
| CN103758532B (en) * | 2014-01-28 | 2016-01-06 | 华南理工大学 | A kind of short-term active enforcement method of metro shield tunnel pipe piece joint |
| CN104533470B (en) * | 2014-11-03 | 2016-08-24 | 同济大学 | A kind of stand-type three ring prototype abnormity shield duct piece mechanical loading units |
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| CN105863734B (en) * | 2016-05-20 | 2017-10-10 | 天津大学 | Double track tunnel excavates existing tunnel simulation monitoring device |
| CN106053110B (en) * | 2016-06-01 | 2018-08-24 | 同济大学 | A kind of pipe ring design methods for shield tunnel model test |
| CN106017961A (en) * | 2016-07-01 | 2016-10-12 | 上海交通大学 | Test model for simulating shield tunnel segment joint |
| CN108444740B (en) * | 2018-03-11 | 2020-04-24 | 北京工业大学 | Soil pressure balance model shield testing machine capable of realizing lining support function |
| CN108776033B (en) * | 2018-03-30 | 2023-09-22 | 西南交通大学 | Lining model for shield tunnel longitudinal model test and manufacturing method |
| CN109118930B (en) * | 2018-07-20 | 2020-10-02 | 同济大学 | Shield tunnel split mounting type segment structure model and design and manufacturing method |
| CN110645015B (en) * | 2019-09-28 | 2020-10-02 | 同济大学 | Shield tunnel segment joint test model with different rigidity under positive and negative bending moment |
| CN116519908A (en) * | 2021-11-17 | 2023-08-01 | 北京市市政工程设计研究总院有限公司 | Shield tunnel model lining for centrifugal model test and manufacturing method thereof |
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| RU2132907C1 (en) * | 1998-06-04 | 1999-07-10 | Дирекция строящегося метрополитена | Tunnel lining |
| JP2001288992A (en) * | 2000-01-31 | 2001-10-19 | Geostr Corp | Segment ring for shield construction work, segment and inter-ring joint |
| CN101299008A (en) * | 2008-06-13 | 2008-11-05 | 同济大学 | Trial model capable of simulating shield tunnel pipe slice joint and manufacturing method thereof |
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2013
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|---|---|---|---|---|
| RU2132907C1 (en) * | 1998-06-04 | 1999-07-10 | Дирекция строящегося метрополитена | Tunnel lining |
| JP2001288992A (en) * | 2000-01-31 | 2001-10-19 | Geostr Corp | Segment ring for shield construction work, segment and inter-ring joint |
| CN101299008A (en) * | 2008-06-13 | 2008-11-05 | 同济大学 | Trial model capable of simulating shield tunnel pipe slice joint and manufacturing method thereof |
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| CN108932902A (en) * | 2018-06-22 | 2018-12-04 | 同济大学 | A kind of Lining Ring design methods of analog shield tunnel girth joint |
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| CN103162981A (en) | 2013-06-19 |
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Effective date of registration: 20210810 Address after: 610000, No. two, section 111, North Ring Road, Jinniu District, Sichuan, Chengdu Patentee after: SOUTHWEST JIAOTONG University Patentee after: FUZHOU METRO GROUP Co.,Ltd. Address before: 610031 No. two, section 111, ring road, Chengdu, Sichuan, China Patentee before: SOUTHWEST JIAOTONG University |
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